KR100528320B1 - Manufacturing method of the old paper-recycled packaging paper using for a kraft paper bag - Google Patents

Abstract

The present invention relates to a method for producing recycled packaging paper for polyethylene film bags having excellent printability and bonding aptitude, using pulp and recycled pulp at 15 to 50% and corrugated paper at 50 to 85%. Pulping, and removing, dispersing, and refining the particles (25-40 DEG SR), and 100-% by weight of the pulped raw material, 0.1-0.3% by weight, 0.05-0.2% by weight of fixing agent, and drying. It consists of the steps of forming a paper of 60 ~ 100g / ㎡ in several layers by adding 0.1 ~ 1.0% by weight of the strength enhancer and other special purpose drugs and dyes.

Description

Manufacturing method of the old paper-recycled packaging paper using for a kraft paper bag}

The present invention relates to a method for producing a waste paper recycling packaging paper made of polyethylene film.

In general, polyethylene film bags are made of kraft paper and woodfree paper. However, functional bonding and appearance and printability of the polyethylene film and paper are particularly required, and a single-forming method is required. Since kraft paper was produced, it did not meet sufficient strength. In addition, since natural pulp, which is a raw material of kraft paper and woodfree paper, depends on the total amount of imports, there are many problems in securing raw materials and costs.

However, recycling paper from recycled old paper or old corrugated containers using a multiply-forming paper manufacturing method may not only diversify the purpose but also the top side of the pulp and recycled pulp. By using it, the appearance and printability are excellent, and the back side can recycle the corrugated cardboard (OCC: old corrugated container) to produce polyethylene film bags and packaging paper with excellent bonding aptitude. Since it bonds with, sufficient strength can be obtained.

Therefore, by using a paper manufacturing method of multiply wrapping paper, pulp is used for the surface layer and recycled paper for the back layer can achieve resource saving, cost reduction, energy saving and productivity improvement.

Disclosure of the Invention An object of the present invention is to solve the conventional problems as described above and to provide a method for producing a waste paper recycling packaging paper made of polyethylene film having excellent printability and bonding ability.

According to the present invention, the recycled paper packaging bag made of polyethylene film is separately poured into natural pulp, recycled pulp and corrugated cardboard, and mixed with water in an appropriate amount to pulping at a concentration of 3 to 15%, and Remove, disperse, and refine the foreign materials to suit the purpose through refining, refiners, etc., mix them well in the raw material storage tank, and then use each layer (size agent, fixing agent, dry intelligence enhancer and other chemicals and dyes used for special purposes). Ply) is added by adjusting the ratio according to the use for each purpose, and then forming it into a wrapping paper of 60 ~ 100g / m ² with multiple layers.

Specifically, 0.1 to 0.3 weight% of the size agent, 0.05 to 0.2 weight% of the fixing agent, and 0.1 to 1.0 weight% of the dry strength enhancer are added to 100 dry weight% of the main raw material to form a paper material, and the head of each paper machine It is introduced into a box to produce multiple layers of wetland, compressed and dried to produce paper.

Hereinafter, the present invention will be described in detail by way of examples.

In the manufacturing method of the base paper according to the present invention, unlike the conventional single-ply manufacturing method, the surface layer using the pulp and recycled pulp to clean the material, screening and refining treatment to meet the required characteristics such as printability, and to form the back layer Silver corrugated cardboard is recycled to remove the foreign matter from the cardboard so that it can be bonded with the bag made of polyethylene film.

The size agent usable in the present invention is a reinforced rosin size, an emulsion size, a synthetic size, a fibrous resin sized agent, a neutral sized agent, and the like, and the fixing agent is aluminum sulfate. , Polyaluminium chloride, polyaluminium hydroxychlorosulfate and the like, and the dry strength enhancer is polyacrylamide, polyvinyl alcohol, live starch, amphoteric starch, enzyme starch, Polyethylene oxide and the like are suitable.

Example

Pulping 50% by weight of pulp and 50% by weight of corrugated cardboard to a concentration of 4%, remove it, disperse and refine it, mix it well in the raw material reservoir, mix 0.18% by weight of the size agent, 0.14% by weight of the fixing agent, and dry paper strength. 0.1 g% of the enhancer was added to prepare 80 g / m 2 of paper.

Table 1 below compares physical properties such as strength of the base paper prepared in the above example with kraft paper generally used for bags made of polyethylene film.

Table 1

division Kraft paper Example Basis weight (g / m²) 80 80 Tear strength (g) Vertical 95 or more 77 horizontal 108 or more 98 Tensile strength (kgf / 15mm) Vertical 6.8 or higher 6.9 horizontal 3.5 or more 3.0 Size (seconds) 15 or more 20 Tensile Strength × Elongation Vertical 15 or more 9.9 horizontal 16.8 or more 9.1 Main raw material Natural pulp Natural Pulp Corrugated Cardboard Remarks KS M 7501 Natural pulp 50% Domestic notice 50%

Each physical property measurement was performed by the following KS model.

Pretreatment of test paper KS M 7012

KS M 7013

Moisture KS M 7023

Tensile Strength KS M 7015

Elongation rate KS M 7015

Tear Strength KS M 7016

   Stokkyhit size too KS M 7025

As shown in Table 1, the base paper according to the present invention recycled waste paper did not show a difference in terms of various strengths compared to kraft paper using natural pulp of the same basis weight, and the base paper according to this embodiment is then polyethylene film and Since joining, sufficient strength can be obtained.

Since the paper produced by the present invention can not only reduce the strength difference between the machine direction and the width direction, but also is produced by multiple layers, the strength and dimensional stability are good. In addition, by recycling the waste paper, it is possible to obtain the effect of resource saving, cost reduction, energy saving and productivity improvement by replacing imported raw materials (natural pulp).

Claims (4)

15 to 50% by weight of natural pulp and recycled pulp and 50 to 85% by weight of corrugated cardboard pulp at a concentration of 3 to 15% by weight, and removing, dispersing and The refining process (25 to 40 ˚SR) and the foreign matter-treated raw material are mixed in a raw material storage tank, and then 100 weight% of the raw material is 0.1 to 0.3 weight% of the size agent, 0.05 to 0.2 weight% of the fixing agent, and 0.1 to 0.1% of the dry strength enhancer. A method for producing a recycled paper packaging bag made of polyethylene film comprising the steps of adding 1.0% by weight, and forming a plurality of layers of 60 to 100 g / m 2. The bag according to claim 1, wherein the size agent is selected from the group consisting of a reinforced rosin size agent, an emulsion size agent, a synthetic size agent, a fibrous resin-based size agent, a neutral size agent, and mixtures thereof. Method for manufacturing recycled paper. The method of claim 1, wherein the fixing agent is selected from the group consisting of aluminum sulfate, polyaluminum chloride, polyaluminum hydroxychlorosulfate, and mixtures thereof. The method of claim 1, wherein the dry strength enhancer is selected from the group consisting of polyacrylamide, polyvinyl alcohol, raw starch, cationic starch, enzyme-treated starch, polyethylene oxide, and mixtures thereof. Method for manufacturing recycled paper.